Swivel connection



March 30 1926.

J. 5. WALTON SWIVEL commonw- Filed Feb. 23, 1924 I [2 eggs-e3 5 II It LL Illl INVENTOR. By J. 5. Walfom.

ATTORNEY.

Patented Mar. 30, 1926.

UNITED STATES JOSEPH S. WALTON, OF LOS ANGELES, CALIFGRNI-A.

SWIVEL CONNECTION.

Application filed February '23; 1924. Serial No. 694,777.

To all w/eom it may concern:

Be it known that I, JOSEPH S. lVaL'roN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Swivel Connection, of which the following is a specification.

This invention relates to improvements in swivel connections for swivel chairs.

The primary object of the invention is to furnish a swivel connection for chairs formed mainly of cast elements.

Another object of the invention is to furnish a. swivel connection which will prevent the chair seat from wa bbling.

Another object is to provide a swivel connection having improved means for tensionthe spring employed i'or returning the chair seat to a predeter'n'iined position.

A further object is to furnish a swivel connection having means for coii'tim'iously inbricating the same.

W'ith the foregoing objects oiitlined and with other objects in view which will zip pear as the description proceeds, the invention consists of the novel i catur'eshereinai ter described in detail, illustrated in the accompanying drawing and more particularly pointed out in the appended claims.

Referring to the drawing:

Figure 1 is a vertical sectional view of a swivel. connection adapted to form part of a swivel stool or chair.

Fig. 2 is a top plan view of the sanie on a reduced scale.

Fig. 3 is a horizontal sectional view taken on line 3 of Fig. 1.

Fig. 1 is a plan view of a fiber disk forming part of the construction.

Fig. 5 is a side view of an adjustable sleeve forming part of the device.

In the drawing, 1 designates the base of a swivel stool, which is provided with inwardly extending flanges 2 and an upwardly extending cup '3.

The cup as shown in Figs. 1 and 3 has an internal annular shoulder 1 interrupted at one point by an inwardly extending stop lug 5.

Resting on the upper edge of the cup 3, is a fiber disk '6, shown detached in Fig. 1. This disk has a recess 7 and an aperture S for purposes hereinafter explained.

Resting; on the disk, is the chair spider 9 having a central hub 10 and radially arranged arins 11, the latter. having ape'i' tunes 12 to receive the screws employed for securing a seat to the spider.

The hub has an inwardly extendingannie lar flange 13 which contacts with the disk 6, and the hub also has a depending flange 14., which engages the edge of the disk and the edge of the upper end or the 'cupl B.

Resting on the lilange 13 is the head 1'5v of a hollow bolt 16. The stem of this belt extends downwardly into the flanges and 1s de'tacliab'ly locked in position by a screw bolt 16 and the base 1 are stationary and that the spider 9 may rotate relatively to' these parts. The flange 13 of thespider has on its under side a depending stop lug 18 which cooperates with the stop 5 to limit the degree oi rotation of the spider. The

lug 18 extends into the recess 7 of the disk 6, so that said disk is forced to partakeof the movements of thespider.

At this point it will he noted that the A sleeve 19 surrounds the stein oi the bolt 16 and is provided at its lower edge with teeth 20, and a milled'flang'e 21 is'integral with the sleeve.

Surrounding the sleeveis a coiled spring 22 having its upper end anchor d in the flange 13 0-1: the spider and its lower end 24: anchored in the flange 21.

In order to tension the spring, the flange 21 is turned by hand to wind up the spring,

and then the pin 25 is passed through apertures in the stem of the bolt and between diametrically opposite teeth 20 of the sleeve 19. Then as the spring tends to unwind, the inclined faces of the teeth 20 which are engaging the pin 25, have a tendency to ride on the pin and force the sleeve 19 upward,

so that the sleeve forces the flange 13 against 7 movement of the spider 9 at this time, the

spider would turn with the sleeve 19 and the spring could not be wound. In order to talre care of this, however, the head 15 is provided with. an outwardly extending lug 26 whicn is adapted to engage an upwardly extending lug 27 provided on the flange 13. When these lugs are engaging one another,

' the flange 21 may be turned until the spring is tensioned to a desired degree, and then the pin 25 is inserted in order to hold the spring in tension, After this the stem of the bolt may be inserted into the flanges 2 and the screw 17 may be tightened to lock the parts in position. Then when the spider 9' is turned by an occupant in leaving the spool,

the spring in unwinding will bring the stop 18 into engagement'with the stop 5, so that the stool seat will be held in a desired position when it is unoccupied.

In order to lubricate the track on which the fiber disk 6 slides, the hub of the spider is provided with a passageway 28 communicating at its lower end with the aperture "8 of the disk and provided at its upper end vents friction and renders the movement of the seat noiseless.

It is apparent that various changes may be made in the details disclosed without departing from the spirit of the invention as expressed in the claims.

What I claim and desire to secure by Letters-Patent is:

1. A swivel connection including a base, a stem rigidly connected to said base and having a laterally extending head, a spider having a portion rotatably mounted between the head and base, stops for limitingthe rotation of the spider, said head being arranged to prevent upward movement of the spider, and resilient means forforcing one of said stops toward the other stop and normally holding said stops incontacting relation, said base being provided with a. cup on which the spider rotates, and the resilient means for forcing one of said stops toward the other stop being located in said cup and including a sleeve rotatably mounted on said stem, detachable means for holding the sleeve in a fixed position relatively to the stem, and a coiled spring arranged in the cup and having one of its ends connected to the sleeve and its other end connected to the spider.

2. A swivel connection for chairs including a baseqarovided with a track, a spider rotatably mounted on the track, a bolt rigidly secured to thebase and having a head constantly bearing upon the spider, stops for the spider, and means for adjustably locking y the sleeve to the bolt for tensioning the spring and holding the sleeve in contact with the spider. I

3. A swivel connection for chairs including a base provided with a track, a spider rotatably mounted on the track, a bolt having a head engaging said spider, means for limiting the rotation of the spider relatively to the head, a sleeve'rotatably mounted on the bolt, a coiled spring surrounding the sleeve having one of its ends connected to the latter and its other end connected to the spider, and means for locking the sleeve to the bolt.

4. A swivel connection for chairs including a base having a cup at its upper end, a spider rotatably mounted on said cup, a bolt having a head engaging said spider, and a stem extending into the cup, means for detachably securing the stem tothe base, stops for limiting the rotation of the spider relatively to the base, other stops for limiting the rotation of the spider relatively to the head of the bolt, a sleeve rotatably mounted on the stem of the bolt and having one of its ends engaging the spider, a coiled spring surrounding the sleeve and having one of its ends secured to the-spider and its other end secured to the sleeve, the other end of said sleeve being provided with teeth having inclined side edges, and a pin connected to the bolt and extending between certain of the teeth of said sleeve.

5. In combination, a stool base having a cup at its upper end provided with an annular horizontal track, a seat spider rotatably mounted on said track, a stem extending into said cup and having a disk-shapedhead arranged above the spider, cooperating stops on the spider and head for limiting the rotation of the spider, means for locking said stem to the base to prevent rotation of the stem, cooperatingstops on the cup and spider for limiting the rotationpf the latter, a sleeve surrounding the stem andprovided with inclined teeth, a pin passing through the stem and engaging spaces between certain of said teeth, and a coiled spring surrounding the sleeve and having one of its ends connected to the spider and its other end connected to the sleeve.

I11 testimony whereof I hereunto aflix my signature.

JOSEPH s. WALTON. 

